Truck runs good while idle

360,000 MILES
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NICH
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  • 2 POSTS
And when get going it starts stalling and the breather top pops up like it is keeping from back firing

changed the spark pklug wires in April of 2013, but noticed the truck would slow down on the freeway when get to about 50mph, changed the wire that was damaged to the spark plug, but not all the wires then it was ok for a day then the same problem.

So I changed the fuel filter thnking it was the problem truck ran fine till later that night on the freeway. Now changed the wire on the distributor to the core and everthying was good had power, did good on the freeway 70mph not issues, until later that night the same problem came back
Nov 12, 2013 at 2:36 AM
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JACOBANDNICKOLAS
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  • 110,248 POSTS
What "breather" is popping off? Also, have you checked the fuel pump pressure to see if it is within the manufacturer's specs?
Nov 12, 2013 at 2:54 AM
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NICH
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I just changed all spark plug wires, took down the street, and I think that done the trick. Thank you for your time !
Nov 12, 2013 at 3:30 AM
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JACOBANDNICKOLAS
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  • 110,248 POSTS
Let me know if you have other questions.
Nov 12, 2013 at 8:22 AM
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CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
YOU MIGHT EVEN USE SHORT SECTIONS OF SPLIT OPEN FUEL/ VACUUM LINE OVER THE PLUG WIRES WHERE THEY RUB/ OR MIGHT RUB ON STUFF

A LITTLE PREVENTION MIGHT MAKE YOUR WIRES LAST A LONG TIME

THE MEDIC
Nov 12, 2013 at 9:17 AM
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